IPA: /rɪˈtaɪər/
KK: /rɪˈtaɪər/
A person who has stopped working, usually because they have reached a certain age or have chosen to leave their job.
After many years of service, he became a retirer and enjoyed his time traveling.
Retirer is derived from the Old French 'retirer', which means to withdraw or pull back. The word is formed from 're-' (meaning again or back) and 'tirer' (meaning to pull). Thus, 'retirer' means to pull back or withdraw again.
Think of 'pulling back' ('tirer') again ('re-') — that's why retirer means to withdraw.